Nonequilibrium entanglement and noise in coupled qubits

2006/02/03 by Neill Lambert, N. Lambert, Ramón Aguado +3 · 2 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Coulomb #Electron #Noise (video) #Non-equilibrium thermodynamics #Physics #Quantum #Quantum Information and Cryptography #Quantum Zeno effect #Quantum and electron transport phenomena #Quantum decoherence #Quantum entanglement #Quantum mechanics #Quantum tunnelling #Qubit #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.75.045340

published as Phys. Rev. B 75, 045340 (2007) · 4 pages, 4 figures

arxiv created 2006/02/03 · openalex publication_date 2007/01/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study the charge entanglement and noise spectrum of two Coulomb-coupled double quantum dots under stationary nonequilibrium transport conditions. In the transport regime, the entanglement exhibits a clear switching threshold and various limits due to suppression of tunneling by quantum Zeno localization or by an interaction-induced energy gap. We also discuss the interdot current correlation as a possible indicator of the entanglement in transport experiments.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Shot-noise spectrum of superradiant entangled excitons
• Shot noise in coupled dots and the “fractional charges”
• Entanglement of Formation of an Arbitrary State of Two Qubits
• Quantum states with Einstein-Podolsky-Rosen correlations admitting a hidden-variable model
• Shot Noise Spectrum of Open Dissipative Quantum Two-Level Systems
• Shot Noise in Mesoscopic Conductors
• Variable Electrostatic Transformer: Controllable Coupling of Two Charge Qubits

Cited by

• Frequency-dependent current noise in quantum heat transfer: A unified polaron calculation
• Electron bunching in stacks of coupled quantum dots